State of Wisconsin Investment Board
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State of Wisconsin Investment Board’s Clean Harbors CLH Stock Holding History

State of Wisconsin Investment Board’s Portfolio CLH Stock Details CLH Fund Activity
Bought
Maintained
Sold
Quarter Market Value Status Shares Change in
Stake 		Trade Value Portfolio Weight Portfolio Position
2026
Q1 		$17.4M Sell
60,636
-2,377
-4% -$649K 0.04% 395
2025
Q4 		$14.8M Sell
63,013
-17,294
-22% -$3.95M 0.03% 474
2025
Q3 		$18.6M Buy
80,307
+4,140
+5% +$980K 0.04% 367
2025
Q2 		$17.6M Sell
76,167
-2,765
-4% -$605K 0.04% 381
2025
Q1 		$15.6M Buy
78,932
+1,073
+1% +$235K 0.04% 413
2024
Q4 		$17.9M Buy
77,859
+9,158
+13% +$2.27M 0.05% 369
2024
Q3 		$16.6M Buy
68,701
+656
+1% +$154K 0.04% 416
2024
Q2 		$15.4M Buy
68,045
+1,045
+2% +$219K 0.04% 398
2024
Q1 		$13.5M Sell
67,000
-8,746
-12% -$1.57M 0.04% 477
2023
Q4 		$13.2M Buy
75,746
+4,925
+7% +$808K 0.04% 469
2023
Q3 		$11.9M Sell
70,821
-3,827
-5% -$645K 0.04% 477
2023
Q2 		$12.3M Sell
74,648
-2,349
-3% -$343K 0.03% 509
2023
Q1 		$11M Sell
76,997
-9,309
-11% -$1.21M 0.03% 539
2022
Q4 		$9.85M Sell
86,306
-3,178
-4% -$371K 0.03% 577
2022
Q3 		$9.84M Sell
89,484
-3,284
-4% -$352K 0.03% 573
2022
Q2 		$8.13M Buy
92,768
+9,187
+11% +$886K 0.02% 738
2022
Q1 		$9.33M Buy
83,581
+77,422
+1,257% +$7.64M 0.02% 830
2021
Q4 		$614K Sell
6,159
-189
-3% -$19.9K ﹤0.01% 1616
2021
Q3 		$659K Buy
6,348
+303
+5% +$29.8K ﹤0.01% 1592
2021
Q2 		$563K Sell
6,045
-482
-7% -$43.8K ﹤0.01% 1657
2021
Q1 		$549K Sell
6,527
-99
-1% -$8.33K ﹤0.01% 1572
2020
Q4 		$504K Sell
6,626
-270
-4% -$18.1K ﹤0.01% 1536
2020
Q3 		$386K Buy
6,896
+140
+2% +$8.29K ﹤0.01% 1566
2020
Q2 		$405K Sell
6,756
-230
-3% -$12.8K ﹤0.01% 1483
2020
Q1 		$359K Sell
6,986
-310
-4% -$22.6K ﹤0.01% 1432
2019
Q4 		$626K Hold
7,296
– – ﹤0.01% 1367
2019
Q3 		$563K Sell
7,296
-48
-0.7% -$3.55K ﹤0.01% 1286
2019
Q2 		$522K Sell
7,344
-2,266
-24% -$158K ﹤0.01% 1313
2019
Q1 		$687K Sell
9,610
-280
-3% -$17.3K ﹤0.01% 1256
2018
Q4 		$488K Hold
9,890
– – ﹤0.01% 1321
2018
Q3 		$708K Sell
9,890
-220
-2% -$14K ﹤0.01% 1314
2018
Q2 		$562K Sell
10,110
-395
-4% -$20.3K ﹤0.01% 1335
2018
Q1 		$513K Sell
10,505
-91,345
-90% -$4.79M ﹤0.01% 1296
2017
Q4 		$5.52M Buy
101,850
+140
+0.1% +$7.58K 0.02% 835
2017
Q3 		$5.77M Buy
101,710
+253
+0.2% +$13.8K 0.02% 810
2017
Q2 		$5.66M Sell
101,457
-7,700
-7% -$443K 0.02% 795
2017
Q1 		$6.07M Sell
109,157
-17,989
-14% -$995K 0.02% 723
2016
Q4 		$7.08M Sell
127,146
-21,874
-15% -$1.1M 0.03% 609
2016
Q3 		$7.15M Buy
149,020
+33,000
+28% +$1.64M 0.03% 648
2016
Q2 		$6.05M Sell
116,020
-6,900
-6% -$345K 0.02% 679
2016
Q1 		$6.07M Sell
122,920
-1,760
-1% -$77.1K 0.02% 694
2015
Q4 		$5.19M Sell
124,680
-1,080
-0.9% -$46.9K 0.02% 749
2015
Q3 		$5.53M Sell
125,760
-1,230
-1% -$61K 0.02% 733
2015
Q2 		$6.82M Sell
126,990
-1,150
-0.9% -$64.2K 0.02% 709
2015
Q1 		$7.28M Sell
128,140
-1,260
-1% -$65.2K 0.03% 683
2014
Q4 		$6.22M Sell
129,400
-15,320
-11% -$747K 0.02% 735
2014
Q3 		$7.8M Buy
144,720
+340
+0.2% +$20K 0.03% 639
2014
Q2 		$9.28M Sell
144,380
-23,880
-14% -$1.42M 0.03% 603
2014
Q1 		$9.22M Sell
168,260
-24,920
-13% -$1.36M 0.04% 602
2013
Q4 		$11.6M Buy
193,180
+33,670
+21% +$1.94M 0.04% 485
2013
Q3 		$9.36M Buy
159,510
+21,550
+16% +$1.2M 0.04% 575
2013
Q2 		$6.97M Buy
+137,960
New +$7.69M 0.03% 670

Other funds holding CLH

BlackRock
BlackRock New York $5.72T AUM 30.48% 1-Year Est. Return
Wellington Management Group
Wellington Management Group Boston, Massachusetts $535B AUM 26.23% 1-Year Est. Return
Janus Henderson Group
Janus Henderson Group London, United Kingdom $209B AUM 37.72% 1-Year Est. Return
VCM
Vanguard Capital Management Malvern, Pennsylvania $4.04T AUM
Fidelity Investments
Fidelity Investments Boston, Massachusetts $1.9T AUM 41.92% 1-Year Est. Return
VPM
Vanguard Portfolio Management Malvern, Pennsylvania $1.91T AUM
LPC
Lone Pine Capital Greenwich, Connecticut $12.5B AUM 54.4% 1-Year Est. Return
State Street
State Street Boston, Massachusetts $2.9T AUM 29.55% 1-Year Est. Return
DCP
D1 Capital Partners New York $11.2B AUM 15.78% 1-Year Est. Return
Pictet Asset Management
Pictet Asset Management Carouge, Switzerland $105B AUM 38.07% 1-Year Est. Return

State of Wisconsin Investment Board's CLH Position: Q1 2026 in Review

State of Wisconsin Investment Board reduced its Clean Harbors (CLH) stake by 3.8% in Q1 2026, selling an estimated $649K and leaving 60,636 shares worth $17.4M. The position accounts for 0.04% of the portfolio, ranked #395.

State of Wisconsin Investment Board first reported a position in CLH in Q2 2013 and has held it in 52 quarters since. The position peaked at $18.6M in Q3 2025. 624 funds tracked by Wall St. Rank hold CLH as of Q1 2026.

  • State of Wisconsin Investment Board held 60,636 shares of Clean Harbors worth $17.4M as of Q1 2026.
  • State of Wisconsin Investment Board sold 2,377 Clean Harbors shares in Q1 2026, an estimated $649K.
  • Clean Harbors made up 0.04% of State of Wisconsin Investment Board's portfolio in Q1 2026, its #395 holding.
  • State of Wisconsin Investment Board first reported a position in Clean Harbors in Q2 2013 and has held it in 52 quarters since.
  • State of Wisconsin Investment Board's Clean Harbors position peaked at $18.6M in Q3 2025.
  • 624 funds tracked by Wall St. Rank held Clean Harbors as of Q1 2026.

Based on State of Wisconsin Investment Board's 13F filing for Q1 2026, filed 15 May 2026.